Headlight



H.` VARDER HEADLIGHT April 7, 1931.

Filed Marh l, 1929 Patented Apr. 7, 1931 UNITED STATES HOLGER VARDER, OF NEW YORK, N. Y.

HEADLIGHT Application filed March 1,

This invention relates to improvements in headlights and has for its particular object to provide a reflector of simple construction which will project a light-beam having a high intensity at its top portion and spreading rays of less intensity at the lower side thereof and at the same time `provide a reflector that is especially adapted for projecting either an upper light-beam whose intense rays will be 1o partially projected above the horizon, or a lower light-beam whose intense rays are projected in a lower plane. The lower lightbeam is particularly adapted to eliminate any glare to opposing drivers, and the upper beam is desirable when driving on lonely7 roads whereon the traffic is not heavy, that is, where only a few opposing cars are on-the road, so that the shifting of the lights would be infrequent.

These objects are attained by the means illustrated in the accompanying drawing, in which:

Fig. 1 is a side view illustrating the projection of an upper light-beam from my improved headlight.

Fig. 2 is a longitudinal vertical section of the improved reflector taken on the line 2-2 of Fig. 4.

Fig. 3 is a front elevation of the reflector shown in Fig. 2.

Fig. 1 is an enlarged view showing in detail the lay-out of the focal points of the several reflectors, also the location of the sources of light. Y

Similar reference numerals in all of the figures of the drawing, designate like parts.

My improved headlight is formed from a plurality of separate reflectors arranged in alinement, of which 15 designates a rear parabolic reflector, from the peripheral edge of which is extended a spherical reflector 16, and extended from the front edge of this spherical reflector is a front parabolic reflector 17. These separateV reflectors are preferably stamped from a single piece of metal, but it is understood that they can be readily manufactured separate from each other and afterwards be joined together in any suitable manner.

The axis for the rear reflector 15 is on the 192e. vSerin No. 343,646.

dotted line a-b, and the axis of the front reflector 17 is on the dotted line 0CZ, this latter axis O d is inclined forwardly and upwardly relative to the axis a-Z Thus the front parabolic reflector 17 is tilted slightly :i

flect-or 16; 22 is the point for the source of li-ght for the upper light-beam, and 21 is the point for the source of light for the lower light-beam.

l/Vhen the source of light is located at point 22, the center of the Alight reflected from the spherical reflector 16 is located at the point. 21, and when the source of light is located at pointV 21, the center of light reflected from reflector 16 is locatedat point 22.

' When the source of ,light is located at 22 to form the upper light-beam, some of the light-rays projected from the reflectors 15 and 16 will overlap the light-rays project-ed from the reflector 17 and the greatest intensity of the combined beams will occur at the overlapped portions.

Y 7When the source of light is located at 21 to form the lower light-beam, the light-beam from the reflector 16 will be completelyrnnmerged with the lightfbeams from the reflec' tors 15 land 17, with the light'beam from the reflector 15 being almost completely merged with the light-beam from the reflector 16 and with the light-beam from the reflector 17 being only merged at its top side with that from reflectors 15 and 16. As with the upper lightbeam, the greatest intensity will occur at the overlapped or merged portion of the beams, and as the source of light for the lower lightbeams is above that of the light source 22, the light-beam therefrom will be projected downwardly compared to the upper light-beam.

It will be observed from Fig. 2, that the focal distance of reflector 15 is greater than the focal distance of the reflector 17, and that the center 2O of the spherical reflector 16 is located between and in vertical alinement with said focal points 18 and 19.

The source of light of course is arranged to be shifted to different points on said vertical line between the focal points 18 and 19 and at equal distances above and below the center 2O of the spherical reflector.

It will be understood that under the usual driving conditions the headlight is adjusted in a manner to position the axis of the rear reflector downwardly so that the light beams will be projected below the horizontal.

Having thus fully described the invention, what is claimed is:

1. A reflector comprising a parabolic rear part, an intermediate spherical part and a parabolic front part, the rear part having a substantially bigger focal length than the front part7 the focal points for the two parabolic reliector parts and the center for the spherical reflector part being spaced apart and located on a vertical line with the center of the spherical reector located between the two foci, and a source of light arranged to be shifted to points on said Vertical line located at equal distances above and below the center of the spherical reflector and between the two foci thereby forming an upper and a lower light-beam.

2. A reliector comprising a parabolic rear part, an intermediate spherical part and a parabolic front part, the rear part having a substantially bigger focal length than the front part, the focal points for the two parabolic reflector parts and the center for the spherical reflector part being spaced apart and located on a vertical line with the center of the spherical reflector located between the two foci, and a source of light arranged to be shifted to points on said vertical line located at equal distances above and below the center of the spherical reliector and between the two foci thereby forming an upper and a. lower light-beam, the axis of the front reflector being slightly upwardly inclined in relation to the axis of the rear reflector.

In testimony whereof I hereunto affix my signature. p

HOLGER VARDER. 

